JPH09124402A - Insect pest control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an insect pest control method having an excellent insect-pest controlling effect for a long term and capable of markedly increasing the working efficiency by application of a specific insecticidal compound as a wet preparation in high application rate before planting nursery plants of vegetables or flowers and ornamental plants. SOLUTION: A drug solution containing about 200-2000ppm of a penetrative non-organophosphorus insecticide is applied to a nursery bed in an amount of about 0.1-20g/m<2> based on the insecticide before planting the nursery plants of vegetables or flowers and ornamental plants. The compound of the formula [R<1> is an alkyl substituted with a cyclic group; R<2> is H or a hydrocarbon, a divalent functional group bonding with R<3> ; R<3> is a hydrocarbon, -SR<4> (R<4> is equal to R<1> ),-N (R<5> )(R<6> ) (R<5> and R<6> are each R<1> ), a divalent group or atom bonding to R<2> ; Y is =N-, =C(Z')-(Z' is H, etc.,); X is an electrophilic group] is preferred as a penetrative non-organophosphorus insecticide. Especially the example of the formula is N-(2-chloro-5-thiazolylmethyl)-N'-methyl-N"- nitroguanidine. The nursery period after folium period is preferred as the timing of the application.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel pest control method in which a chemical solution containing a permeable non-organophosphorus insecticide compound is applied to a nursery bed in a high dose before planting seedlings of vegetables and flowers.

[0002]

2. Description of the Related Art With recent breakthroughs in compound synthesis technology, biotechnology, screening methods for pest control agents, etc., it has a strong insecticidal activity, low toxicity to humans and animals, phytotoxicity to plants and environmental pollution. Pest control agents that are less likely to occur have been introduced one after another into the world. For example, the guanidine derivative described in JP-A-3-157308 and the like is an insecticidal compound having an extremely low dose and appropriately acting as compared with the conventional organophosphorus and carbamate insecticides. In addition, in JP-A-7-112901, in order to control harmful insects of fruits and vegetables, at the time of planting and / or after planting of the fruits and vegetables, at a planting hole location and / or the adjacent peripheral portion, In addition, the origin of the flower and / or
Or, in the vicinity of the vicinity, about 0.005-per plant
An insecticidal method has been proposed in which about 0.025 g of an osmotic insecticidal compound is applied in the form of a liquid formulation.

[0003]

However, it takes a great deal of labor to apply a certain amount of a drug to a specific portion at the time of planting seedlings or after planting such plant strains, so that it is a serious problem these days. In many cases, it is not realistic given the lack of agricultural labor and the tendency of large-scale agriculture. Also,
Generally, in the pest control method using a liquid formulation by the conventional method, long-term residual effect cannot be expected, and therefore, aphids, Thrips palmi thrips, whitefly such as tobacco whiteflies, etc. are harmed from before planting to after planting. Continuous pest control required a large number of sprays and a great deal of labor.

[0004]

SUMMARY OF THE INVENTION In view of such circumstances, the inventors of the present invention have been able to effectively and labor-savingly control pests of vegetables and flowers and the types of insecticidal compounds,
Formulation form of pesticide, concentration of active ingredient, application rate, application method,
As a result of extensive research on the application period, etc., the active ingredient was applied to the target plant body by applying the osmotic non-organophosphorus insecticidal compound as a liquid formulation at a higher dose than before before planting seedlings. It has been found that it can be effectively absorbed, a superior pest control effect can be obtained over a long period of time, and that work efficiency can be greatly improved.
As a result of further research based on these findings, the present invention has been completed.

That is, according to the present invention, (1) before seedling planting of vegetables or flowers, a chemical solution containing about 200 to about 2000 ppm of a permeable non-organophosphorus insecticide compound is added to the nursery bed in an amount of about 0. 1 to about 20 g / m ² applied, a method for controlling insect pests of vegetables and flowers,
(2) The permeable non-organophosphorus insecticidal compound has the formula (I)

Embedded image Represents an alkyl group substituted with a ring group, R ² is a hydrogen atom,
A divalent group bonded to a hydrocarbon group or R ^3, R ³ is a hydrocarbon group, -SR ⁴ (R ⁴ has the same meaning as R ^1.),
—N (R ⁵ ) (R ⁶ ) (R ⁵ and R ⁶ are the same or different, and R ¹
Has the same meaning as ) Or a divalent group or atom bonded to R ² , Y represents ═N— or ═C (Z ¹ ) — (Z ¹ represents a hydrogen atom or a hydrocarbon group), and X represents electron withdrawing. Indicates a group. ] The pest control method according to (1) above, which is a compound represented by the formula (3), wherein in the formula (I), R ¹ is a hydrogen atom, C _1-6 alkyl, formyl, C _1-4 alkylcarbonyl, C _{6- 10} arylcarbonyl, C _1-4 alkylsulfonyl, or C _1-3 alkyl substituted with a 3 to 6-membered heterocyclic group having at least one optionally substituted nitrogen atom, and R ² is a hydrogen atom, C _1-6 alkyl, C _1-4 alkylene or —CH ₂ —N (Z ² ) —CH ₂ — (Z ² represents a hydrogen atom, C _1-6 alkyl or C _1-4 alkylcarbonyl). , R ³ is C _1-6 alkyl, —S—R
⁴¹ (R ⁴¹ represents a hydrogen atom, C _1-6 alkyl, or C _1-4 alkylcarbonyl), —N (R ⁵¹ ) (R ⁶¹ ) (R ⁵¹ and R ⁶¹ are the same or different, and are C _{1 -6} alkyl), C _1-4 alkylene, -S-, -N (Z ³ )-(Z
³ has the same meaning as Z ² ) and Y is = N- or = CH.
The pest control method according to (2), wherein X is nitro or cyano, and (4) the compound represented by formula (I):
N- (2-chloro-5-thiazolylmethyl) -N'-methyl-N "-nitroguanidine, 1- (6-chloro-3
-Pyridylmethyl) -N-nitroimidazolidine-2-
Ylidene amine, N-cyano-N- (2-chloro-3-
Pyridylmethyl) -N'-methylacetamidine or 1
-[N- (6-chloro-3-pyridylmethyl) -N-ethylamino] -1-methylamino-2-nitroethylene, the method for controlling pests according to (2), (5) before planting seedlings, The present invention relates to the pest control method according to (1), which is a seedling raising period after the leaf stage of the seedling, and (6) the pest control method according to (1), wherein the period for controlling pests is at least one month after application of the chemical solution.

The permeable non-organophosphorus insecticidal compounds used in the present invention include carbamic acid esters, organic chlorine-containing compounds, guanidine derivatives described in JP-A-3-157308, which has recently been in the spotlight, and JP-A-2. -288859
Nitro compounds described in JP-A-2-288860, nitroimino compounds described in JP-A-61-267575, nitro compounds described in JP-A-60-218386 and JP-A-61-178981. Methylene derivatives and others JP-A-62-181382, JP-A-2-2
Known compounds described in 35881 and WO91 / 04965 are included. Among these, the osmotic non-organophosphorus insecticidal compounds represented by the above general formula (I) have low toxicity to warm-blooded animals, are less likely to cause environmental pollution, have extremely low phytotoxicity to plants, and are highly toxic to plants after administration. It is particularly preferably used for the practice of the present invention because it penetrates into the plant from roots and stems and exerts an excellent pest control effect over a long period of time. In the compound (I), examples of the hydrocarbon group represented by R ¹ include C _1-6 alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl and hexyl, For example, C _3-10 cycloalkyl such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc., C _2-10 alkenyl such as vinyl, allyl, 2-methylallyl, 2-butenyl, 3-butenyl, 3-octenyl such as ethynyl, 2 -C such as propynyl and 3-hexynyl
_2-10 alkynyl, eg C _3-10 cycloalkenyl such as cyclopropenyl, cyclopentenyl, cyclohexenyl, etc., C _6-10 aryl such as phenyl, naphthyl, etc.,
Examples thereof include C _7-10 aralkyl such as benzyl and phenylethyl.

The acyl group represented by R ¹ includes formyl and C such as acetyl, propionyl and butyryl.
_4alkyl -, benzoyl, C _6-10 aryl, such xyloyl - carbonyl, methyl sulfonyl,
_Examples thereof include C _1-4 alkylsulfonyl such as ethylsulfonyl, propylsulfonyl and butylsulfonyl.
The heterocyclic group of the alkyl group substituted by the optionally substituted heterocyclic group represented by R ¹ is a 3- to 6-membered ring containing 1 to 5 heteroatoms such as oxygen atom, sulfur atom and nitrogen atom. Or a condensed ring thereof, and specific examples thereof include:
For example, 2- or 3-thienyl, 2- or 3-furyl, 2- or 3-pyrrolyl, 2-, 3- or 4-.
Pyridyl, 2-, 4- or 5-oxazolyl, 2-,
4- or 5-thiazolyl, 3-, 4- or 5-pyrazolyl, 2-, 4- or 5-isoxazolyl, 3
-, 4- or 5-isothiazolyl, 3- or 5-
(1,2,4-oxadiazolyl) 1,3,4-oxadiazolyl, 3- or 5- (1,2,4-thiadiazolyl), 1,3,4-thiadiazolyl, 4- or 5-
(1,2,3-thiadiazolyl), 1,2,5-thiadiazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, 1H- or 2H-tetrazolyl, N-oxide-2-, 3- Or 4-pyridyl, 2-, 4- or 5-pyrimidyl, N-oxide-2-, 4- or 5-pyrimidinyl, 3- or 4-pyridazinyl, pyrazinyl, N-oxide-3- or 4-pyridazinyl,
Benzofuryl, benzothiazolyl, benzoxazolyl, triazinyl, oxotriazinyl, tetrazolo [1,5-b] pyridazinyl, triazolo [4,5-
b] pyridazinyl, oxoimidazolinyl, dioxotriazinyl, pyrrolidinyl, piperidinyl, pyranyl, thiopyranyl, 1,4-oxazinyl, morpholinyl,
1,4-thiazinyl, 1,3-thiazinyl, piperazinyl, benzimidazolyl, quinolyl, isoquinolyl, cinnonyl, phthalazinyl, quinazolinyl, quinoxalinyl, indolizinyl, quinolidinyl, 1,8-naphthyridinyl, purinyl, pterinidinyl, dibenzofuranyl, carbazolyl, acridinyl, Examples include phenanthridinyl, phenazinyl, phenothiazinyl, phenoxazinyl and the like.

Preferred heterocyclic groups are 5- or 6-membered nitrogen-containing heterocyclic groups such as 2-, 3- or 4-pyridyl, 2-, 4- or 5-thiazolyl. These heterocyclic groups may have the same or different substituents,
It may have 1 to 5, preferably 1, such substituents include, for example, methyl, ethyl, propyl,
Isopropyl, butyl, isobutyl, s-butyl, t-
In addition to C _1-6 alkyl such as butyl, pentyl, isopentyl, hexyl, and isohexyl, C _2-6 alkenyl, C
_2-6 alkynyl, C _6-10 aryl, C _7-9 aralkyl, nitro, hydroxyl group, mercapto, oxo, thioxo, cyano, carbamoyl, carboxyl, halogen (F, Cl, B
r etc.), C _1-4 alkoxy, C _1-4 alkylthio, C _1-4 alkylsulfinyl, C _6-10 arylsulfinyl, C
_1-4 alkylsulfonyl, C _6-10 aryl-sulfonyl, amino, C _1-6 acylamino, mono- or di-C _1-4 alkylamino, C _1-6 acyl, C _6-10 aryl-carbonyl, oxygen, sulfur , 1 to a heteroatom selected from nitrogen
Examples include 5- to 6-membered heterocyclic groups containing four.

Particularly preferred examples of the heterocyclic group are pyridyl and thiazolyl groups which may be substituted with 1 or 2 halogens. The alkyl group in the alkyl group substituted with an optionally substituted heterocyclic group is, for example, C _1-3 such as methyl, ethyl, propyl and the like.
And an alkyl group. Specific examples of the hydrocarbon group represented by R ² and R ³ are the same as those of R ¹ described above, as suitable examples thereof. Further, the divalent group represented by R ² and bonded to R ³ includes C _1-4 alkylene such as ethylene and trimethylene, —CH ₂ N (Z ₂ ) —CH ₂ — (Z ² is hydrogen, methyl, C _1-6 alkyl such as ethyl, propyl, n-butyl, isobutyl, acetyl, propionyl,
It represents a C _1-4 alkyl-carbonyl such as butyryl. )
And the like. Specific examples of the divalent group or atom represented by R ³ which is bonded to R ² include -S
-, C _1-4 alkylene such as methylene and ethylene, --N
Examples thereof include groups represented by (Z ³ )-(Z ³ has the same meaning as Z ^2, and specific examples are also the same). Formula = C represented by Y (Z ¹⁾ - (. Z ¹ is showing a hydrogen atom or a hydrocarbon group) of a hydrocarbon group and examples of the hydrocarbon group represented by Z ¹ as those described above for R ¹ Preferable ones are the same as those mentioned above, and preferable examples of the substituent of the hydrocarbon group are the same as those mentioned above as the substituents of the heterocyclic group.

Examples of the electron withdrawing group represented by X include cyano, nitro, C _1-4 alkoxy-carbonyl such as methoxycarbonyl and ethoxycarbonyl,
Hydroxycarbonyl, for example C _6-10 aryl-oxycarbonyl such as phenoxycarbonyl, heterocyclic oxycarbonyl such as pyridyloxycarbonyl, thienyloxycarbonyl (the above-mentioned ones are used as the heterocyclic group), for example methylsulfonyl. , C _1-4 alkylsulfonyl optionally substituted with halogen (F, Cl, Br etc.) such as trifluoromethylsulfonyl, ethylsulfonyl and the like, sulfamoyl, di-C _1-4 alkoxyphosphoryl such as diethoxyphosphoryl and the like. , C _1-4 acyl _optionally substituted by halogen (Cl, Br, F, etc.) such as acetyl, trichloroacetyl, trifluoroacetyl, etc., eg C such as benzoyl, etc.
_6-10 arylcarbonyl, carbamoyl, and C _1-4 alkylsulfonylthiocarbamoyl such as methylsulfonylthiocarbamoyl.

The compound (I) is an inorganic acid such as hydrochloric acid, hydrobromic acid, hydroiodic acid, phosphoric acid, sulfuric acid or perchloric acid, for example formic acid, acetic acid, tartaric acid, malic acid, citric acid,
It may be used as a salt with an organic acid such as oxalic acid, succinic acid, benzoic acid, picric acid and p-toluenesulfonic acid. Compound (I) used in the pest control method of the present invention
The following compounds and the like can be illustrated as specific examples of. (I) 1- [N- (6-chloro-3-pyridylmethyl)
-N-ethylamino] -1-methylamino-2-nitroethylene, (ii) N- (2-chloro-5-thiazolylmethyl) -N'-methyl-N "-nitroguanidine, (ii
i) 1- (6-chloro-3-pyridylmethyl) -N-nitro-imidazolidin-2-ylideneamine, (iv) N
-(6-chloro-3-pyridylmethyl) -N'-cyano-N-methylacetamidine, (v) 1- (6-chloro-3-pyridylmethyl) -5-methyl-2-nitroimino-hexahydro-1 , 3,5-triazine, (vi) 1
-(2-Chloro-5-thiazolylmethyl) -3,5-dimethyl-2-nitroimino-hexahydro-1,3,5
-Triazine, (vii) 1- (6-chloro-3-pyridylmethyl) -3,5-dimethyl-2-nitroimino-hexahydro-1,3,5-triazine, (viii) 1-
(6-Chloro-3-pyridylmethyl) -2-nitromethylene-imidazolidine, (ix) 1- [N- (2-chloro-5-thiazolylmethyl) -N-ethylamino] -1-
Methylamino-2-nitroethylene, (x) 3- (6-
Chloro-3-pyridylmethyl) -2-nitromethylene-
Thiazolidine, (xi) 1- (6-chloro-3-pyridylmethyl) -2- (1-nitro-2-allylthioethylidene) imidazolidine, (xii) 1- (6-chloro-3-)
Pyridylmethyl) -2- (1-nitro-2-ethylthioethylidene) imidazolidine, (xiii) 1- (6-chloro-3-pyridylmethyl) -2- (1-nitro-2-β
-Methylallylthioethylidene) imidazolidine, (xi
v) Methyl-[[3- (6-chloro-3-pyridylmethyl) -1-methyl-2-nitro] guanidinoformate, (xv) 1- (6-chloro-3-pyridylmethylamino) -1- Methylthio-2-nitroethylene,

(Xvi) 1- (6-chloro-3-pyridylmethylamino) -1-methylamino-2-nitroethylene, (xvii) 1- (6-chloro-3-pyridylmethyl)
-3-nitro-2-methylisothiourea, (xviii)
3- (6-chloro-3-pyridylmethyl) -1-methyl-2-nitroguanidine, (xix) 1- (6-chloro-
3-pyridylmethylamino) -1-dimethylamino-2
-Nitroethylene, (xx) 1- [N- (2-chloro-5
-Pyridylmethyl) -N-methylamino] -1-methylamino-2-nitroethylene, (xxi) 1- [N- (6
-Chloro-3-pyridylmethyl) -N-methylamino]
-1-dimethylamino-2-nitroethylene, (xxii)
3- (6-chloro-3-pyridylmethyl) -1,1-dimethyl-2-nitroguanidine, (xxiii) 1- (6-
Chloro-3-pyridylmethylamino) -1-ethylamino-2-nitroethylene, (xxiv) 1-amino-1-
[N- (6-chloro-3-pyridylmethyl) -N-methylamino] -2-nitroethylene, (xxv) 3- (6-
Chloro-3-pyridylmethyl) -1,3-dimethyl-2
-Nitroguanidine, (xxvi) 3- (6-chloro-3-
Pyridylmethyl) -1,1,3-trimethyl-2-nitroguanidine, (xxvii) 1-amino-1- [N- (6
-Chloro-3-pyridylmethyl) -N-ethylamino]
2-nitroethylene, (xxviii) 1- [N- (6-chloro-3-pyridylmethyl) -Nn-propylamino] -1-methylamino-2-nitroethylene, (xxi
x) 1- [N- (6-chloro-3-pyridylmethyl)-
N-ethylamino] -1-ethylamino-2-nitroethylene, (xxx) 3- (6-chloro-3-pyridylmethyl) -3-ethyl-1-methyl-2-nitroguanidine. Among them, (i) 1- [N- (6-chloro-3-pyridylmethyl) -N-ethylamino] -1-methylamino-2-nitroethylene, (ii) N- (2-chloro-5-
Thiazolylmethyl) -N'-methyl-N "-nitroguanidine, (iii) 1- (6-chloro-3-pyridylmethyl) -N-nitro-imidazolidine-2-ylideneamine or (iv) N- (6-chloro) -3-pyridylmethyl) -N'-cyano-N-methylacetamidine, etc. The above compounds are representative examples of the compound (I), and they do not limit the pest control method of the present invention. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the practice of the present invention, seedling means a young plant up to planting of a crop to be transplanted and cultivated, seedling raising means seedling raising, seedling raising means before seedling is planted. Means the cultivation period of. For seedlings at the seedling raising stage, 1 leaf stage,
The number of leaves attached to the seedling, such as the 2-leaf stage and the 3-leaf stage, may indicate the growing period of the seedling. The nursery is a place for raising seedlings, and examples thereof include a poly pot, a paper pot, a house floor, and an open-air floor. The drug application in the present invention is carried out before planting seedlings, but generally it is effective to carry out from the 1-leaf stage to 1 to 2 days before planting seedlings. In the pest control method of the present invention, for example, the 2-3 leaf stage for cucumber, the 5-6 leaf stage for eggplant, and the first flower cluster flowering stage for tomato are particularly suitable. The compound (I) is applied at a high dose, but for example, a chemical solution containing the compound (I) can be applied to a compound (I) per 1 m ² seedbed using a watering device having a watering nozzle, a watering device such as raindrops, or a general spraying device. ) Is about 0.1 g to about 20 g, preferably about 0.5 g to about 5 g. Specifically, a chemical solution of the compound (I) prepared at a concentration of about 200 to about 2000 ppm, preferably about 200 to about 1000 ppm is added to about 1000 to about 10 per 10 are.
Dispense about 2,000 liters or about 2 to about 100 ml per seedling. The concentration of the above compound (I) and the amount of the treating chemical solution can be appropriately changed depending on the type and size of the target crop, the seedling raising method, and the like. In the pest control method of the present invention, specific examples of the vegetable crops that are the target crops include, for example, cucumber, melon, watermelon, eggplant, peppers, fruit vegetables such as tomato, Japanese radish, turnip, carrot,
Examples include root vegetables such as burdock, stem vegetables such as asparagus and udo, flower vegetables such as proccoli and hanayasai, and leaf vegetables such as cabbage and Chinese cabbage. Is mentioned. In the pest control method of the present invention, specific examples of the pests to be controlled include, for example, cotton aphids, aphids such as green peach aphids, whitefly whiteflies, whiteflies such as whitefly Whitefly, thrips such as southern white thrips, and leaf beetle. Such as, for example, leaf flies. Especially aphids,
It is preferably used for whiteflies and the like.

In the method for controlling pests of the present invention, a drug solution containing compound (I), that is, a liquid preparation is used. As the liquid preparation, for example, in addition to suspensions, emulsions, milk suspensions, liquid preparations obtained by diluting a water solvent or a wettable powder with water are used. These preparations can be usually produced by a known method. For example, the compound (I) can be produced by mixing the compound (I) with a general additive used for liquid agricultural chemical formulations (eg, liquid diluent, surfactant, etc.) and diluting with water. Examples of the liquid diluent include aromatic hydrocarbons (eg, xylene, toluene,
Alkylnaphthalene, etc.), chlorinated aromatic or chlorinated aliphatic hydrocarbons (eg, chlorobenzenes, ethylene chloride, methylene chloride, etc.), aliphatic hydrocarbons (eg, cyclohexane, paraffins (eg, mineral oil fraction) Etc.)], alcohols (eg, butanol, glycol and their ethers, esters, etc.), ketones (eg, acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexanone), strong polar solvents (eg, dimethylformamide, dimethyl sulfoxide). Etc.) and water.

The surfactants include nonionic and anionic surfactants [eg polyoxyethylene fatty acid esters, polyoxyethylene fatty acid alcohol ethers (eg alkylaryl polyglycol ethers, alkyl sulfonates, alkyl salts Sulfates, aryl sulfonates, etc.)], albumin hydrolysis products can be used. In addition, a colorant may be used in the preparation, and examples of the colorant include inorganic pigments (for example, iron oxide, titanium oxide, Prussian blue, etc.), alizarin dyes, azo dyes, and metal phthalocyanine dyes. Such organic dyes are used. In addition, trace elements such as iron, manganese, boron, copper, cobalt, molybdenum, zinc salts thereof and the like can also be used. In the wettable powder and water solvent used in the present invention,
The compound (I) can be added usually in an amount of about 0.1 to about 95% by weight, preferably 0.5 to 90% by weight. In addition, in the wettable powder and water solvent used in the present invention, the above-mentioned additive is usually added in an amount of about 0.1 to about 95% by weight, preferably about 0.
5 to about 90% by weight can be added. The chemicals used in the pest control method of the present invention include, in addition to the compound (I),
If necessary, other pesticidal active compounds, for example, other insecticides other than the permeable non-organophosphorus insecticide compound (I), fungicides, acaricides, plant growth regulators and the like can be mixed.

[0016]

EXAMPLES Next, the contents of the present invention will be specifically described by showing examples, but the present invention should not be limited to these.

Example 1 Control effect against cotton aphid [Test compound] The following four types of compounds were used. No. 1: 1- [N- (6-chloro-3-pyridylmethyl) -N-ethylamino] -1-methylamino-2-nitroethylene No. 2: N- (2-chloro-5-thiazolylmethyl)
-N'-methyl-N "-nitroguanidine No. 3: 1- (6-chloro-3-pyridylmethyl)-
N-nitro-imidazolidine-2-ylideneamine No. 4: N-cyano-N- (2-chloro-5-pyridylmethyl) -N'-methylacetamidine [Pharmaceutical preparation] A chemical solution containing 333 ppm was prepared by dissolving with acetone or diluting each of a water solvent and a wettable powder with water. [Crop] Eggplant (cultivar: Senryuji No. 2), 1 ward, 9 strains, 4 consecutive treatments [Treatment method] 30 ml of the chemical solution per seedling was sprayed onto the seedlings using rainy dew, and planted in the field one day later. On a predetermined survey day, the number of cotton aphids parasitic on three leaves per plant was investigated for the central 7 plants in each ward. [Results] The control rate was calculated by the following formula, and the results are shown in [Table 1]. Control rate (%) = (1-number of surviving insects in treated group / number of surviving insects in untreated group) x 100

[0017]

[Table 1] From Table 1, it was found that the aphids parasitic on eggplants can be efficiently controlled by using the method for controlling pests of the present invention.

[0018]

INDUSTRIAL APPLICABILITY According to the present invention, a medicinal solution containing a permeable non-organophosphorus insecticide compound (I) is applied at a high concentration and a high dose before planting seedlings of vegetables and flowers, and the treatment is carried out only once. Not only during seedling raising but also after planting, it is possible to completely control pests such as aphids, white thrips, whitefly, etc. for a long period of more than one month after administration.
Moreover, the chemical treatment can be carried out by supplying the seedlings with water mixed with the chemicals during irrigation as a regular work during the seedling raising period, and the working efficiency can be improved. Also, the labor can be significantly reduced. Furthermore, when the fertilizer is mixed with water and given during seedling raising, the drug can be mixed at the same time.

Claims (6)

[Claims] 1. An osmotic non-organophosphorus insecticidal compound is added in an amount of about 200 to about 2000 p before planting seedlings of vegetables and flowers.
A chemical solution containing pm is added to the seedbed as the insecticidal compound in an amount of about 0.1.
A method for controlling pests of vegetables and flowers, which comprises applying about 20 g / m ² . 2. An osmotic non-organophosphorus insecticide compound represented by the formula (I): Represents an alkyl group substituted with a ring group, R ² is a hydrogen atom,
A divalent group bonded to a hydrocarbon group or R ^3, R ³ is a hydrocarbon group, -SR ⁴ (R ⁴ has the same meaning as R ^1.),
—N (R ⁵ ) (R ⁶ ) (R ⁵ and R ⁶ are the same or different and R ¹
Has the same meaning as ) Or a divalent group or atom bonded to R ² , Y represents ═N— or ═C (Z ¹ ) — (Z ¹ represents a hydrogen atom or a hydrocarbon group), and X represents electron withdrawing. Indicates a group. ] The pest control method according to claim 1, which is a compound represented by the following formula. 3. In the formula (I), R ¹ is a hydrogen atom, C _1-6
Alkyl, formyl, C _1-4 alkylcarbonyl, C
_6-10 arylcarbonyl, C _1-4 alkylsulfonyl,
Or C _1-3 alkyl substituted with a 3 to 6 membered heterocyclic group having at least one optionally substituted nitrogen atom, and R ² is a hydrogen atom, C _1-6 alkyl, C _1-4 alkylene Or —CH ₂ —N (Z ² ) —CH ₂ — (Z ² is a hydrogen atom,
C _1-6 alkyl or C _1-4 alkylcarbonyl is shown. )
And R ³ is C _1-6 alkyl, —S—R ⁴¹ (R ⁴¹ represents a hydrogen atom, C _1-6 alkyl, or C _1-4 alkylcarbonyl), —N (R ⁵¹ ) (R ⁶¹ ) (R ⁵¹ and R ⁶¹ are the same or different and each represent C _1-6 alkyl), C _1-4 alkylene, —S—, —N (Z ³ ) — (Z ³ has the same meaning as Z ^2. And Y is = N- or = CH-, and X is nitro or cyano. 4. A compound represented by the formula (I) is N- (2-chloro-5-thiazolylmethyl) -N'-methyl-N "-nitroguanidine, 1- (6-chloro-3
-Pyridylmethyl) -N-nitroimidazolidine-2-
Ylidene amine, N-cyano-N- (2-chloro-3-
Pyridylmethyl) -N'-methylacetamidine or 1
The pest control method according to claim 2, which is-[N- (6-chloro-3-pyridylmethyl) -N-ethylamino] -1-methylamino-2-nitroethylene. 5. The method for controlling pests according to claim 1, wherein the seedlings are planted before the seedling is grown after the leaf stage. 6. The method for controlling pests according to claim 1, wherein the period for controlling the pests is at least one month after application of the chemical solution.